16318256212531 has 32 divisors (see below), whose sum is σ = 20169477160448. Its totient is φ = 12856214453760.

The previous prime is 16318256212501. The next prime is 16318256212537. The reversal of 16318256212531 is 13521265281361.

It is a cyclic number.

It is not a de Polignac number, because 16318256212531 - 2¹³ = 16318256204339 is a prime.

It is a super-2 number, since 2×16318256212531² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16318256212537) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 240922036 + ... + 240989758.

It is an arithmetic number, because the mean of its divisors is an integer number (630296161264).

Almost surely, 2^{16318256212531} is an apocalyptic number.

16318256212531 is a deficient number, since it is larger than the sum of its proper divisors (3851220947917).

16318256212531 is a wasteful number, since it uses less digits than its factorization.

16318256212531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78971.

The product of its digits is 518400, while the sum is 46.

The spelling of 16318256212531 in words is "sixteen trillion, three hundred eighteen billion, two hundred fifty-six million, two hundred twelve thousand, five hundred thirty-one".